Brake mechanism.



G. S. AUKLBY.

BRFKE MBGENISM.

APPLMA'MON FILED MAYza,19os.

91 0,633. Patented Jan. 26, 1909,

2 SHEETS-SHEET 1.

G. s. UKLBY. BRAKE HBUHANISM.

APPLIUATIOE FILED HAY 28, 190B.

910,633. Patented .1311.251909 l 2 SHEETS-SHEET 2.

fzrzesses: jg-i207: Mw M .w/,ZW

" UNITED STATES GRIFFIN S. AOKLEY; OF BUFFALO, NEW YORK.

" BRAKE IMECHANIBM.

To all whom 'it may concern.'

Beit known that I, GRIFFIN S. ACKLEY, a citizen of the United States, residing at y Buffalo, in the county of Erie and State f lNew York, have invented a new and useul Improvement in Brake Mechanisms, of which the followin is a specification.

This invention re ates more particularly to that type of brake mechanisms for cars in which a hand-actuated brake stati, or crank shaft is geared to and rotates aschain drum having a spiral-like periphery so that the chain winds upon peripheral portions of successively decreasing radius, whereby the slack oflthe chain is qulckly taken up and the leverage thereon increases as the rotation of the stati' and drum is continued.

The. winding mechanism, includin the drinn and gearing and containing graine therefor, is ordinarily sold to the railroads for installation on cars already equipped with the brake staffs and other brake parts, and as different cars vary considerably in construction and the brake staffs are located in dill'erent ositions thereon, a winding mechanism w lich is suitable for one car can only be applied to another car with much labor and considerable expense b a skilled mechanic. 1n these windin mec ianisins as heretofore constructed, the rake stati' constitutes the bearing shaft for one or more of the fears, and must be specially machined and tted to the winding mechanism, which adds materially to the cost of installation, and usually requires the work to be done in a well equipped machine shop` One object of this invention is to produce a practical and eflicient chain winding mechanism of a construction which adapts it to be readily adjusted to cars which differ in construction or have the brake parts diHerentlv located thereon, and which also enables the brake sta' to be fitted or connected to the winding mechanism with the minimum expense and labor.

Other objects of the invention are to iinprove the construction of these winding mechanisms so that the brakescan be set quickly with less exertion and so that they will rlease readily; also to provide a chain winding drum of novel construction which o crates more quickly to take up the slack in tie chain and give the maximum` leverage thereon; also to provide simple but safe and reliable means for adjustably attaching the Specification of Letters Patent.

Application led Hay 2B, 1908. Serial No. 485,482.

Patented nu. 2e, 1909..

chain to the drum, whereby the same drum can be used Where a greater orless length of chain must be wound up to set the brakes.

In the accom anying drawings, consisting of two sheets: igure 1 is a plan view, partly in section, of a'brake mechanism embodying the invention, different portions-of the same on the car being indicated by full and broken lines. Fig. 2 is a sectional elevation, on an enlarged scale, thereof. plan view thereof. Fig. 4 is a side elevation thereof. Fig. 5 is a sectional lan thereof in line 5*5, Fig. 4. Fig. 6 is a iorizontal see-- tion of the drum, in line 6 6, Fig. 2. Fig. 7 is a similar view showing another chain adjustment. Fig. 8 is a fragmentary elevation if the drum partly in section in line 8--8 like letters of reference refer to like parte in the several figures.

The containing or supporting frame of the winding mechanism c inprises a horizontal base or plate A which is securely fastened to the under side of the car floor a, referably by bolts o at the four corners of t 1e base, and an adjustable yoke B of substantially U- shape which extends diagonally beneath the base and is rigidly secured at op insite ends to diagonally opposite corners t ereof. in the construction shown, the yoke is secured to the base b f two of the bolts o.' for fastening the base to the car'floor, and the base is pro; vided with depending tongues o, 3 and 4, which engage in grooves in the ends of the yoke to cooperate with the bolts in holding the yoke rigidly in position. The yoke can be secured in the diagonal position shown by full lines in Figs. 2-5, or it can be secured in the other diagonal position indicated by broken lines in F ig. 3, it being secured in one or the other position, depending upon the position of the base on the car. Y

C represents the u right brake steil', which, as usual, has a han crank at its upper end and is journaled at or near its upper end in a suitable bearing (not shown) on the car, and is provided near its lower end with a ratchet wheel c for holding it when it is turned to appiy the brake.

represents a pinion which is secured to the lower end of the brake stati and meshes with gear teeth e on the chain druinl? for rotating the latter to wind the brake chain lF thereon. The base, late A is provided with an integral hollow caring boss d, Fig. 2,

Fig. 3 is a bottom tit) whieh preferably extends up into a hole in the ear floor through which the brake stati passes, and the pinion D has an integral shaft or sleeve d which extends into and is journaled in said bearing boss, in which -it is retain( d by a suitable eollar or the like d. The pinion is thus journaled on the base plate A entirely independently of the brake stall' and the latter is simply seeurei'l to *he pinion for turning' it. As shown, the lower end ol' the brake taff is :iquareianil is seeured in a square socket. or hole in the pinion shaft by a eotter pin d", but the Stall' eould be oeeined to the pinion in any other suitable way. With this eonstruetion it is only neeeseary for the louer end of the statt' to be Squared so as to enter the soeket ot' the pinion, and as the pinion is journaled independently ot' the tall it will turn freely and not bind even il' the stall' does not fit perfectly in the pinion or is aoniewhat eeeentrie thereto. The pinion is also retained in iti; bearing in dqpendently of the stallby the collar d* and no harm eould arise from the loss or breaking of the eotter pin d3, which, however, supple niente the rollar in retaining the pinion 1n its bearing.

A roller bearing d* of any suitable construction is preferably provided for the pinion shaft in the bearing boss il between the pinion and its retaining collar d2.

The chain drum E is journaled between the base A and yoke B. In so far as the other features of the mechanism are concerned, the drum could be of the spiral-form eoinnionly used, but preferably the periphery thereof' on which the chain winds is composed of a coneent rie helieal portion e' of relatively large radinv whieh extends part way around the drinn` a i-oneentrie cylind'ieal portion e`-I of smalti-r rai tins, nud a substantially straight inelined portion e which connects the large and sinzill port ions e' and e2. A flange or rib i eneirrlin; the drinn prevents the chain from `dippiner troni one to the other portion thereofY The lil-'ge eonifentrie portion e' of the drinn is longer than a spiral portion of equal maximum radius extending; the Sinne number of di r e around tl1edrinn,anrl the straight portion i, bein;v the `ahorteht path belneen the large and smell roneentrie portions. ini-renseiv` the levi-rege on the eliain more rapidly than a spiral portion eontd, so that with a drinn of the deseribed t'orln the slnrk of tbe ihain een be taken up and the nuixiniiiin leverage thereon eeured with a shorter rotar) :movement than with a `epiral drinn of the Haine lnaxirnuin radius.

The rhein i*` is. provided with a long: end linkv fu hirh i curved on the naine radius as the large eonrintrie portion e' of the drinn :und i wruieil in a cireuiut'erential ehnnnelf in the drinn b i boltsorpinsffpaesing through thi` link and through twoholesf in the drinn, l

chain and thus adapts the drinn to be used with brakes in which different lengths of chain have to be wound on the drum to take up the slack. Each boltf2 shown has ahead seated between ribs on the top of the drum and is held in place by a Cotter pin passing through holes in the ribs over the bolt head. This way of retaining the ehain bolt is niueh more reliable than a nut or other securing device on the bolt which eould work loose and allow the chain to be detached. The curved linkf bears for its full length on the surface of the drum and does not exert any lateral strain on the boltsf". The two bolts passing through the link anord a doubly safe eonneetion, for if the forward bolt, whieh normally receives the strain, breaks the other bolt will hold the chain. When both bolts are used, as shown in Fig. 7, the ehain will swing away from the drinn at the rear end of the end link f, whereas il' the rear bolt f is removed the end link can suing outnardly on the forward bolt, as indie-ated by dotted lines in Fig. (i, the connection thunl enabling a. less or greater length of stark chain to be taken up before the leverage is inereased. 'this attaehing device is preferred but. other means could be employed for attarhing the chain to the drum, and the deaeribed adjustable eonnertion for the rhain i'oiild be used with drums of other eonatrnet ion.

The drum is journaled on n. stud axle G, Fig. 2, which is rigidly fixed at ita upper end to the base A of the frame and tits lofi yely at its lower end in a hole in the yoke li. 'l`he yoke thus braces the lou er end of the axle but it can be readily detached from the baae, and removed to permit the drinn to be slipped onto and off of the axle. A roller bearing ll for the drinn surrounds the ripper or fixed end of the axle in a bore` in the large end of the drinn. This roller bearing does not extend into the small ryiindrieal end e2 of the drum, which enablebl this` part ofthe drum to be made of smaller diameter than otherwise, thereby givinter greater final leverage. The axle passing through the small end of the druin serves to steady it or hold it from being pulled. out of the vertieal position, but the rollerv ll on the rigid upper end o1l the axle constitute the real bearing for the drum.

The desrribed winding rneihanisni is more universally adaptable to dill'erent. nuikea of care than those heretofore nifide. 'lhe traine ran be sei'ureil on the enr in different positions as may be required by reason ol different arrangements of the ear l'i'anie nieinbers und different loi'ations ofthe brnkeetnll, :ind the yoke li i'an bi :idiusteil to itl poeitiona will phire it inorr` nenrly in the lini` of iii-:ift on the i-hiiin to prevent the drinn froni ranting. Very little work is required to erinnert the stall' to the pinion heiihirh enaldebA different adjustments of the 1 cause, as explained, the staff does not forni whirhever of Y masas the bearing for the pinion I) and'therefore does not have to be accurately fitted, as in constructions where it forms the inion shaft and must be properly {itted to earings in the frame of the winding mechanism. As the pinion l.) has a firm bearing in the frame, no hearing is required for the lower end of the brake stati' other than the socket in the pinion. The adiustable chain connection for the drum nrlnits the winding mechanism to be placed in diil'erent positions without lengthening or shortening the chain or to be used with chains ref uiring different len ths thereof tobe wound u) to set the bra 'es. The roller bearing for tlhe pinion I) coperates with that for the drum to make the mechanism operate easily and insures the ready releasing of the brakes which is not possible ill the pinion does not rotate freely.

I claim as my invention:

1. ln a brake mechanism, the combination of a winding drum, a frame on which the same is journaled comprisin a base adapted to be secured to the car, an a brace for the drum journal, and means for rigidly securing said brace in different relations to said base, substantially as set forth.

2. In a brake mechanism, the combination of' a winding drum, a frame on which the same is journaled comprising a base ada ted to be secured tothe car, and a yoke w ich extends from end to end of said base beneath the same and forms a bearing for the drum journal, and means for securin said yoke in either of two different diagonal positions on the base, substantially as set forth.

3. ln a brake mechanism, the combination of a winding druni, a frame on which the same is journaled comprising a base, and a yoke which extends diagonali beneath the same and forms a bearing lor the drum 'ourn-al, and bolts at the four corners of said ase forsecuring it to the ear, said yoke being secured to said base by the bolts at diagonali opposite corners of the base, substantial y as set forth.

4. In a brake mechanism, the combination of a winding drum, a supporting frame for the same comprising a base adapted to be secured to thepar an( a yoke which is adjustable to diiere'nt positions on said base, a stud axle for said drum rigidly secured to said base and bearing loosely in said yoke, and a roller bearing between said drum and said stud axle, substantially as set forth.

5. In a brake mechanism, the combination of a winding drum, a frame on which said drum is journaled secured to the car, a pinion geared to said drum andlhaving a olloW shaft, a bearing on said frame in Which said hollow shaft is journaled, and a brake stati' having an end ortion which is secured in said hollow sha t and is logated within said bearing, substantially as svt forth.

6. In a brake mechanism., the combination of a windingr drum, a frame on which said drum is journaled secured to the car and having an integral bearing boss for a pinion, a pinion geared to said drum and having an integral hollow shaft journaledin said bearing boss, and a brake stail' having an end ortion which extends through said ho low shaft, substantially as set forth.

7. In a brake mechanism, a chain drum having a periphe upon which the chain Winds, composed o a concentric helical por tion of relatively large radius extending part way around the drum, a concentric portion of smaller radius, and a substantially straight portion connecting said large and small concentric portions, substantially as set forth.

8. In abrake mechanism, t e combination of a chain drum having a peri heral channel intersected by a plurality o bolt holes, a chain having a curved link located in said channel, and a bolt pr pin ada ted to be placed in one or the other of sai bolt holes to adiustably secure said chain to said drum, substantially as set forth.

9. In a brake mechanism, the combination of a chain drum, a chain, and a fastenin bolt for said chain passing verticall throng one of the chain links and throug holes in the drum, said bolt having a head at its upper end seated between projecting arts on the upper portion of the drum, an a retaining device for the bolt passing through said rojecting arts on the drum above said olt head, su stantislly as set forth.

Witness my hand, this 26th `day of May, 1908.

GRIFFIN S. ACKLEY. 

